當前國際環境的結構制約下，兩岸問題的政治解決才是克服台海安全困境的可行途徑。其中，信心建立措施即是敵對國家政治解決途徑中，最廣為熟知的一套方法。該措施旨在透過一系列政治與軍事安排，逐步消除敵對國家之間因誤解與誤判而升高軍事衝突的可能，進而建立安全合作所需的政治信任基礎，主要包括宣示性、溝通性、透明化、限制性與查證措施。回顧冷戰歐洲推動信心建立措施的發展經驗發現，大國政治立場為敵對國家能否順利推動互信機制之關鍵。就此觀點而言，兩岸推動信心建立措施的過程中，美國政府的政策立場亦是觀察分析的重點。基於此，本文擬採LowellDittmer戰略三角的理論，分析美國、台灣與中國大陸之間三角關係的變化，對兩岸推動信心建立措施之影響與政策意涵。首先，本文將回顧相關研究文獻，檢視信心建立措施理論並歸納其具體作法；其次，闡述兩岸推動互信機制之沿革與具體成果；最後則是在美中台三邊關係互動現況的基礎上，結合戰略三角理論進行邏輯辯證，進一步研析兩岸互信機制的發展困境及其未來展望。研究發現，透過美中台三角關係進行研究分析，不僅有助於學術研究成果貼近國際現實，更能從中思考我國國家安全戰略規劃之發展方向，以做為政府當局擘劃對外政策之參考。

Being conditioned by the international environment, political settlement would be the practical approach to escape from Cross-Strait security dilemma. Confidence-Building Measures (CBMs) is one of the perceived political settlements as engaging antagonistic countries. CBMs aim to mitigate possibility of conflict between countries which escalate resulted from misunderstanding and misestimating, so as to build confident basis necessary for security cooperation, including declaration, communication, transpiration, constraint, and verification measures. Reviewing European experience of CBMs, big powers’ position is the key point decided whether adversaries can set CBMs or not. Based on this viewpoint, U.S. would play a decisive role in the progress of the Cross-Strait CBMs. This article aims to explore the effects and implications of constructing Cross-Strait CBMs as strategic triangle relations changing among U.S., Taiwan, and China by Lowell Dittmer’s theory. First, it reviews research documents about CBMs and collect usable arguments. Second, to provide development and achievements of Cross-Strait CBMs. Finally, to explain what the predicament and prosperity could be as using the Lowell Dittmer’s theory to analyze recent U.S.-Taiwan-China strategic triangle relations. The result shows that, strategic triangle analysis can help the Cross-Strait studies getting closer to international reality, and rethink the strategic direction of national security planning which suggests materials in foreign policy decision-making process.